Staple driving implement



March 2, 19 8- R. E. PETERSON EIT'AL STAPLE DRIVING IMPLEMENT 7 Filed March 16, 1945 4Sheets-Sheet 1 M a M glu-Innlmm March 2,

STAPLE DRIVING Filed March 16, 1945 R. E. PETERSON ET AL IMPLEMENT 4 Sheets-Sheet 2.

III

Patented Mar. 2, 1948 23mm smrnEnRmmG Tass ls, 00 1111.;

sn assuri- -by m I ationyNor' walkg csnn a em-paranoiacar-Delaware Applicationk-Marcli-ilfi Ser /1N6." 583,108

This invention relates to.' portable staple 1 driving implementsparticularly of the work stacking, type wherein a 'powerspring is tension'd flb'y hand actuation" for driving staples point" .ror most into work from ,an automatically fedsupply of staples V stored in the implement.

An important object of the invention is :w-

avoid the damaging effects ofishokslisftaiiied by the frame and working fparts-ofifsuchian 1111- 17161116111?" as a result of abruptly cheCKing'Qthe sharp blow of the staple delivering parts; ilItl-is' also an object to'jliduce .orieliminate vthde of'the implement to, rehaun gt romrthe wdrki el i tacked responsively to' s'uch blow. The shdckg f.

the blow nthe.im iememiits r iski articiflariysevere if hammering parts of fiw'eiighty riatu'r are operatedidly as forfir'ingstapies through space, instead of directly'linto .shf'o'ck absorbing work against which the implementis pr'essd. Damage 7 to the implement from 'thesefreqiintly repeatedextra severe shocksjmay varyerramt' ctu r new turing of the implementsfrarnewtoi'exeessive wear or mechanical fatigue of .tlieispring: powered staple driving mechanism.

A related aim isjto'avbid theidama mgefieets r of such shocksjby g'enerating kihetic inertiadn 'g-m'ow composed as 'largely' as no'sfsib-lje of';a,ece1erated w hty l anithe parts which strike" the staple d1;

ing ram in-order to enable a'pqwerspring'higlil y' to accelerate the same when tensionediandira leased by --sma11 an u ar winging: movement bf a hand operated aetuatirig' lever.

Another object- 1s to dampen theblow 'Qffthe staple driving par-ts' in the absene pr; a staple to be driven, orin t-he absence of resistive vwqrk into which to -drive-a*stap1e; ibyintercepting" slantingly directed movemerit of such'parts hy means of an improved 'bufler construction that more efiectively'absorbs the impact of the staijle driving power delivering parts before thesam'js' transmitted to the frame' 'of -the-implefientt A'further object is to simpi'ify'and'reriderjmor'e sturdy the atu'atingparts of a sta ile diffifillfig power deli-vering mehanism by reducing, the number-of such parts,: theniimber qfjiulerums QII which-they-are pivoted and thf number of actuating 'springs'empleyedrazid byyarrangi-nthe parts to overlap one--another-igi ijidinghl *inLreIatWeiyswingabl'e relationship.

A sm ruan rbbiect sewa e .flie rarieg driving *1: ower -deliv'e'ring part "'easuyade'ssibl briinlsnection mama-11s remo'vab1e gfroni she.

nilil fiil .fQ 311611 311 .0 replacement withbi 't necessitating th us of "special tqols.

*These and other objects of the invention will 11 e eiappar nfi'ins eater .de a llir 'm th idiovring' dsqrip bn lot a s1l C $u embodiment f the"p esentimnr vements W ifc'h descript n? pendedgdrawings wherein:

40 14 is a View' taken in section on'the plane I l-4A ineFig. '7 looking; in the direction-0f the arias. l 1

;oui in rim esstapirtserrm advantageously r f i ii tmct d 111 the factua 1 iz w epr s n ed in arm' V eateldihollwhas ipdrti n J exten i h 'e ti t ke portion pr el ngated ta ker, and

tfier Sand, if-desired, formed by he frame body or its two men Qfirame comprises a l-hgliowg-staple driving "fr ed-tend o hatac e a el nv s en rsp'tivly website sides bf the ion i staple driving mechanism and 4 by side lugs 42 which conformingly abut against the under surface of the handle lever. The front end of skirt 40 projects to form a stop horn 43 which abuts the rear shoulder of the implement head l0 and serves to limit the upward swinging movement of the handle to its position shown in Figs.1.and6.- a

, Between the spaced rigid side walls of skirt 40 power lever 28 has a rearward extension 34 which is free to swing relatively to th handle and skirt, this extension being slidably guided and con- Qcealed by aid skirt walls. Also swingable between removably secured to the frame casting by screws V H3 or if Preferred cast integral therewith. Thus handle I3 is pivotally mounted at a location on the implement frame to swing toward and away ends are fixedly lodged in the said side walls of from channel I6 in a manner to traverse, an an gular gap between the channel and the position of the handle most remote therefrom shown in Figs. 1 and 6.

The implement head I8 is recessed'to form a vertically elongated spring chamber 22 in which reciprocates vertically" a'sta'ple driving ram blade 24 best shown in Fig. 11 containing a rectangular aperture 23. Vertical slide bearing for guiding the blade 24 in a straight path of reciprocative movement i afforded by the front edges 25 of the stiff channel'piece 26 which lines spring chamber22, and the blade 24 is constrained in sliding contact with such channel piece edges 25 by the front wall of a slide cover 32. In this slide cover there is bumped out forwardly a narrow vertically elongated channel 3| which provides clearance for a blade impelling lug 29 on power transmitting lever 28. Lug 29 projects forward through aperture 23 in the staple driver or ram blade 24 with sufiicient clearance to permit lug 29 to move in an arcuate path while blade 24 moves in a straight path and without any binding between these parts. Power lever 28 is included in the is swingably mounted on the same pivot pin I4 as is handle I3 and is located centrally within bifurcate extension I5.of thelatter. A power spring 2'! is 'constantly compressed between thetop end'of chamber 22 and the top edge of power lever 28. The latter has an upstanding anchorage lug 33 which projects guidingly into the bottom end of spring coil 21. The latter is otherwise unattached to lever 28 but merely bears on same and is thereby easily separable from lever 28 for. ready removal from chamber 22.

The manner in which the inturned flanges 36 of the side walls of slide cover 32 slidably engage and occupy the lateral grooves {35in frame head It] as a means of'holding the cover removably in place as shown in Figs. 1, 3 and 6 is apparent from Fig. 9 and is referred to in greater particular in United States Patent No. 2,143,384 granted to R. E. Peterson and, need not here be'described in greater detail,

Referring particularly to Figs. 6, 8, 12 and 14,

handle lever I3 is seen to be, equipped with a rigid skirt 48 in the nature of an inverted U-shaped channel member whose two spaced side walls or flanges are interposed between power lever 28 and the bifurcate extension I5 of handle lever I3 and extend to and are pivotally mounted on the pivot pin [4 thereby to increase the aggregate thickness of metal comprising the hub bearing of handle lever I3 in contact with this pivot pin. The roof wall of skirt 40 joins together the skirt flanges and is fixedly fastened to dished handle lever I3 by a screw 4 I. The skirt further is braced against lateral tipping relative to the handle lever between the latter and channel i6.

and relatively to the side walls or flanges of skirt 40 is a driving connection including pawl 46 pivotally mounted on a cross pin 4'! whose opposite ting with the roof wall of skirt 40 to determine these limit positions. Thu pawl 46 comprises instrumentalities for operating the staple driving mechanism and travels with and extends from handle Si in a direction to span the angular gap A small spring coil 48 seated in a blind hole 49 in the top edge of the pawl is constantly under axial compression and thrusts against the roof wall of skirt 48 to bias pawl 46 clockwise or constantly toward its position shown in Figs. 6 and '7. The lower end of pawl 46 is divided into an impelling spur 50 and a tripping spur 5| which latter traverses a path to encounter and be deflected b a cross pin 52 at a particular point in its downward travel. Thi cross pin bridges channel I6 and is lodged in the side walls of grip I2 as shown in Figs. 13 and 14. Thus pawl 46 is operative normally to transmit impelling force from the handle lever I3 to power lever 28 in only one direction of lever swinging movement and cross pin 52 of the trip means causes pawl 46 to shift relatively to handle lever l3 to disabling position at a predetermined point in the clockwise handle lever I 3.

For restoring handle l3 and its carried skirt 4!! to their uppermost positions shown in Figs. 1 and 6, an auxiliary spring herein shown asan arcuately deflected spring coil 53 is anchored in the floor wall of channel I6 in the grip I2 by means of the removable spring stud 54. The free upper or moving end of spring coil 53 passes constantly against the laterally spaced bottom edges of skirt 40 in a direction to urge handle I3 counterclockwise about its pivot pin I4. Figs. 6, 7 and 8 make clear that atfno time does spring 53 encounter or interfere with the free full swinging movement of power lever 28 owing to the bowed shape of the latter.

Power lever 28 has'a downward directed buffer nose 58 which meets a buffer block 59 whose shape is best shown in;v Fig. 11 and which should be composed of solid rubber or equivalent resilient shock absorbing material capable of receivswinging movement of mg and dampening the blow thereagainst of tightly fitting the block Such cavity may be afiorded. .by ithBwShfiIJB-t to whichathe:imnlenrzent frame is cast. The aforementioned-islideccover 232- when once, in. --place ,fiankscthei imnt :of the :bumper block-59 but-sleavesssuiifici'entgspacei;be:-

tween itself and this; Cblock'i toi'affordqa vertical plennent ;-contains. and. completelysendompasses .a,

magazine chamber. or; passa eway; 39: extending lengthwise thereof: and opening-throughboth the front? endand the xrear endi ofulthe. base, The cross 1 sectional shape? of this r chamber will be clear from 'Figs ii. 12- andlB. The; entire-length of chamber. this occupied :by. thastaple guiding track bar 38 whose cross sectional shape islikewise shown in sa-idEigs-A, 12 and 13. lThis leaves a space between track-bar: 38 (and chamber 39 -'fiorming an inverted -.U,-'shaped passageway: 31 through which. staples-e165 are"v .fed toward the front end-of theirnplement where they are admitted one by onednto the staple ejecting: orifice .65 at the bottom-.endpfthe-raceway under ram :blade 24. This feeding of thel-staplesvis automatically, periorn ediin conventional: manner by the staple follower 51 which ridesalong passageway 31- andisconstantly biased: toward the left in Fig; 6 by a longstap1e-feedingspring 56 loosely surrounding a' rod 55 along which a guide loop 6! that fixedly depends from the staple; follower is-f-reely slidable. "Spring: '56 bears at, its .for- Ward'endagainst saidguide loop 61 and at its rear end bearsaagainstgthe; upright reach of the bent handle aend :68.- of"rod- 55. The free terminus of this" handle-hooksretainingly but :removably into an; anchorage: hole 69' in the roof "Wall-of magazine chamber 39. q 7

The operation ofvthe' aforedescribed parts consists in grasping the ip l2 together with the handle lever l3 within. the palm .of the operators hand, the grip notches I 9y affording'natural locating Seats for the operators. fingers. '7 The sizeof the parts is suchthat the heel of the. operators thumb-can easilyreach and rest atop the handle lever l3 ready to depressitiby a clenching action of the hand. Theimplement. as a whole can thus be firmly grasped and steadily maneuvered for placing its staple Jejecting orificertfi at any precise and easily observed location where it is desired to-drive a staple,

' Steady; squeezing action of the operators hand now depresses handle lever I3'from its'position in Figs. 1 and 6 toits position. in Fig. 'Zagainst the combined resistance of powersprin 21 and han dle restoringspring-53. During this spring tensioning stroke of handle I 3 lever 28 is propelled clockwisefrom its positionin Fig. 6 to its osition in Fig. 7 owing to- .the-engage ment of its rearward extension 34 :by thespurill on pawl 46. The reactive force between these parts is not in a direction to set up any force moment tending to :turn pawl '46 counterclockwiseabout pivot 41. The direction 'of such rea'ctive force; in relation to pawl pivot ALremains constant -.throughiout the stroke because "of the factthatnfiring lever-Z8 and handle |3-- swingaboutthe zsame pivotal axis. When theiclockwise swingingiofipower lever 28 6 hasisufilcientlyrliited ramsbladeifl ito'lclear th stapleieiectingerscewav; thei-stanleicedine-s rins 56 vurges stapletqlloWerjith id the ent reistrimo staplesrii 5,,iorwardso that theirentfit inle automatically :comes gtomccu y sthe :raceway u der blade has shown in Fig. 7.

-;Il1:T-Fig. '7' it: wills-be seenijthatthe-tripping spur 5. I; oirpawlw l 6, at;lthisopointgencounters theinterentin rcross mm 52: this; spuraand. pin th s 0 opera ng e- .trip 1-,means '2 whereby a o t nue downward movement pflhandle 1'3 1 causes the pawl to be cammed or deflected counterclockwise about its :.:pi-vot%: pins 4,1, to; suchangextent-j that howersleverlzarescapes the: drivingr pur Marthe pawl. =NOWEDQW8IT5SDIHI 21; abr,upt1y;forces'. .th li ht:weightvp weri-lever counterclockwise building, up; great speedtherein {which .speedis; impartedatdrammblade zrdgisothat-lthe latterdriyes the; foremost: stanle'kfii-xswizftly -'0utofaorlfice 63 intothe-:Workthatds togbe tacked. 1 If the-drivin of; theystaple;pinto-{theiworkzsdoes; not -,arr.est Jthis .powerstroke; thexfiringaleveriifliis arrested resili- 'entlyrwith.a'lminimum degree 'ofrebound by the shock: absorbing interceptiontof'zbuffer-block 59 when struckizby :t he:bufien:n1ose:58- of the power lever. 2 This/however. will. take: .place "only after .rambl'ade 24 -has imoved :downward a little far- Ither than is required told-rive the. staple fully into the work. Aft'er the staiple -firing st1foke bf lever 28 takes place, handle I3 is released'byspreading open-the hand's'o that spring 53' acts to-lift the handleto its initial;- position shown'in Figs. 1 and '6ready -for*subsequent* actuation. In its fliiting--travel -with-handle 13-" pawl '46 --wipes againsttheend of ower. :lever 28 as is permitted'by the -yie1 diha of pawl spring E8 until l e spurso "ar es ust abovethepfiring l ver at whi chj'time thei'pawrs i ggs toward the left iritoflits position shown LinFigl 6 ready again to jimpell' the power-lever. downward.

"While; the .nowenjs'piingl ooill 21. is shown as made .of square of fiat'sidedwire, round -wire may be substituted 'and th'ere are manyotherpossible substitutes. andialternativeswior the particular shapes and; arrangemeiitssot parts herein. shown, wherefore such: .susbtitutes and alternatives are comprehended-and -ineluded within -.the intended meaning, of the following v-c-lai-ms.

--We claim: c

- portahle-istaple drivingimplement; pawl pperatedstaplegdrivingi mechanism -inc1uding he 'combination'kwithfi implementfr me o a han- -d1e 1-1evier.;: p vo a iwamonntedson said-1 frame; to swing about an axis, a power leverz;,:pivotally mounted ;to-swi;ng;:,aboutysaidiplmtal; axis; a staple f driver dmpellably related to said; :power lever, and drivlngiconnection shiftablyicarriedfin onev'of saidZ leyers and arranged 'to transmit imvpelling:-iorce;irormsaid-handle lever, tosaid power lever in onlyr one, direction of lever swinging inovemenh a, power -.spring stationed by said .frame arranged to urge said power: lever in the opposite direction .oiss wing-ingi-movement, and an auxiliary. springistationed;bysaid frame arranged to urge :said handlesleven in said oppositerotary direction.

2. .In ap rtableflstap le ..drivli1g, implement, pawl operated stapler, drivinggmechanisml. including the combination =l-with an implement frame of, a swingable handle lever, aapower. lever, a staple drivergu'ided by-said frame-in a straieht path. of movement and ,.irnpellably; engaged ,by, the front endr ion a d;roweel ve ian i i mnection shiitalply carried ton lone-pt? said levers and arranged to transmit impelling force from said handle lever to said power lever in only one direction of lever swinging movement, a'power spring urging said power lever in the opposite direction of swinging movement stationed by said frame and arranged toengage with said front end portion of said firing lever and to follow movement of the latter along said path of movement of said staple driver, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

3. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a power lever, a staple driving blade substantially as thin as the thickness of the driven staple slidably guided in a straight path of endwise sliding movement by said frame and impellably engaged directly by said power lever, and driving connection shiftably carried on one of said levers and arranged to transmit impelling force from said handle lever to said power lever in only one direction of lever swinging movement, a power spring stationed by said frame arranged to urge said firing lever in the opposite direction of swinging movement,

and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

4. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a staple driver comprising a blade slidably guided by said frame for endwise reciprocative movement in a straight path, a power lever pivotally mounted on said frame in such position that one end of said power lever impellingly engages said blade while moving arcuately along said straight path of blade movement, and driving connection shlftably carried on one of said levers and arranged to transmit impelling force from said handle lever to said power lever in only one direction of lever swinging movement, a power spring stationed by said frame arranged to urge said power lever in the opposite direction of swinging movement, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite .rotary direction, together with a shock absorbing abutment on said implement frame positioned to intercept the arcuate movement of said firin lever end while the latter-is traveling arcuately in slanting relation to said straight path of blade movement. V

5. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a swingable power lever, a staple driver impellably related to said power lever, a drive transmitting connection carried on one of said levers in a manner to be shiftable relatively thereto and 1 operative V normally to transmit impelling force from said handle lever to said power lever in only one direction of swinging movement, a power spring stationed by said frame arranged to urge said power lever'in the opposite direction of swinging movement, a connection tripping device constructed and arranged to cause automatic shifting of said drive transmitting connection relatively to said one of said levers to a disabling position at a predetermined point in the'swinging movement of said one of said levers in'the said one direction, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

6. 'In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a handle lever mounted on said frame to swin about a pivotal axis, a power lever mounted on said frame to swing about said pivotal axis, a staple driver impellably related to said power lever, a shiftabledriving connection carried on one of said levers and operative normally to transmit impelling force from said handle lever to said power lever in only one direction of swinging movement, a power spring stationed by said frame arranged to urge said power lever in the opposite direction of swinging movement, trip means automatically operative to shift said driving connection to a disabling position at a predetermined point in the swinging movement of said one of said levers, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

'7. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a swingable power lever, a staple driver impellably related to said power lever, a shiftable driving connection carried on one of said levers and operative normally to transmit impelling force from said handle lever to said power lever in only one direction of swinging movement, a power spring stationed by said frame arranged to urge said power lever in the opposite direction of swinging movement, trip means arranged to shift said driving connection to a disabling position at a predetermined point in the swinging movement of said one of said levers, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction, the said driving connection including a pawl pivotally mounted on said handle lever yieldably biased to a position normally to engage impellingly with said power lever and to encounter said trip means while traveling with said handle lever.

8. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of. a swingable handle lever, a staple driver impellably related to said power lever, a shiftable driving connection carried on one of said levers and operative normally to transmit impelling force from said handle lever to said power lever in only one direction or swinging movement, a power spring stationed by said frame arranged to urge said power lever in the opposite direction of swinging movement, trip means for shifting said driving connection to a disabling position at a predetermined point in the swinging movement of said one of said levers including an interceptor stationed on said implement frame in a position to be engaged by and to deflect said driving connection while the latter is riding with one of said levers and in a manner freeing said power lever from impelling engagement by said driving connection, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

9, In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a swingabl power lever, a staple driver impellably related to said powerleverrashiftable driving connection carried-on one of said levers and operative normolly-to transmit: impellings-sfproe from said handle, lever to saidipowerileven :inonly one direction of swinging-immanent. a-ipower: spring stationed said framaarrangedl to .urge' said powerlever in the opposite direction of swinging movement, tripmeansefionlshiftingasaid driving connection-to ardisablingrposition at .a predetermined point in the swingingmoyementof said one of said levers including a pawl pivotally mounted on said handleleveryieldably biased to a position normally to engage impellingly with .said power lever and an interceptor stationed onthe. implee merit. frame in a position. to be r engaged r by and cause deflection of; saidydriving connection while riding with said handlecleveriand. in. a-manner tdfreesaid Wen leverfrem impellingaengagement bysaid pawl, and an auxiliarytspring stationed by said framearrangedto urge said-handle lever. in said oppositerotafydirection.

10. In a portable staple driving implement, pawl operated staple vdrivingmechanism including: the combination with an implement frame of, a swingable handle lever, at'swingable power lever having-a frontfendportion, astapledriver im; pellablyengaged by-said front end portion of the power lover, a shiftablegdriving connection carried on one of said leversgandtoperative.normally to transmit-imp lling force from said handle lefver to said power, iever-inon-ly onesdirection of swingin movemment, a powerspring stationed by said; frame. arranged to thrust-against'said front end portion ofthe power lever inithe ,opnositewditmotion ofelever swinging movement. and inthe edireotionofrstaple drivingmovement or; saidxdri-ver, trip means automatically;operative.toshiit-said drivin conneot onto disa l nanosi i n at a predetermined-point in the swinging movement of said onesof .said11eversand an auxiliary spring stationed by s id fra e-larranged -to urge" said h ndl lever -lsaldopmsitelrotary direction.

11411 fizip i fii l istaple driving implement, pawl operated;stapleldrivlng mechanism including the combination with an implement frame of, a, swingable nanometer; sewn-game power lever hav n era erasesone in media esa leveren'dson which said pt yeris in a staple driver impellably engaged by pipe of" said power lever 'endsj a shiftable driving connection impellingly engaging the pillar of said opposite the. 21 lsysr... a ted-o idjihandl M; t smit 92 .saldhandlalerer to saidpove e aqir sliono s si thr ws! series slelia ledh ss r tarran to urge said power lever in the .o

pposite direction of swinging movement, trip means automatically operative to shift said driving connection to a disabling position at a predetermined point in the swinging movement of said one .of said levers, and an auxiliary spring stationed by said frame arranged to urge said handle lever in said opposite rotary direction.

12. In a portable staple driving implement, pawl operated staple driving mechanism including the combination with an implement frame of, a swingable handle lever, a staple driver impellably related to said power lever comprising a blade slidably guided by said implement frame for endwlse reciprocative movement in a straight path, a swingable power lever pivotally-mounted on said frame in such position that one end of said power lever impellingly engages said blade while moving arcuately in directions slantingly power lever i-nt only. one direction or swingin movement, a. power spring stationed by said frame arranged tad-urge; said power. lever mine opposite: directions or swinging. movement, trip means automatically operative toshift said driving connection to adisah n position at a predeterminedpoint in, thevswingingmovcment of said one of said; levers, and an auxiliaryspring stationed by said frame arranged to urge said handle lever in said opposite rotary direction; to .gether'with ashock absorbing abutment on said implement framepositioned to intercept the arcuatemovement of said power. lever while the lat ter is traveling in slantingrelati-on to said path ofvblade movement. t

13; In a portable v staple driving implement, pawl operated staple driving mechanism includ ing thehcombination with animplement frame of, a. swin able handlelever, a staple, driver impellably related .to said power lever comprisinga blade. slidably guided by said implement frame for endwise reciprocative movement in a straight path, a swingablepowerlevcr pivotally mounted on said frame in such: position that one end of said power lever impellingly engages said blade while moving arcuately vin directions, slantingly relatedto saidstralght path of blademovement, a shiftable, driving. connection carried on one of said levers and operative normally to transmit impellingt force: from. vsaid handle-s lever to said power lever invonly one direction of swinging movemenita Dower spring stationed bysaid frame arranged to urge'vsaidspower lever in the opposite ldirection of=swinging movement, trip means automatically operative to shift said driving connection to a disabling, position at apredetermined point in the swinging. movement of said one of 7 said implement framepositionedtointercept the .a tcuatei movement oi-saidpower lever while the latter is travelinglin slanting relation to said-path of bladetmovement.

14.-.-.In .a stapleidriving implement the combination .of; a frame including atgripadapted to be grasped by the ioperatorvschand' having spaced side walls defining a channel .spaceltherebetween', ahandle .pivotally mounted .on said frame and diverging ;from lsaidgripito .leavesan angular gap therebetween,staplesdriyingimechanism in part located in said angular gap including a power lever, a skirt carried by said handle occupying said angular gapand swingable into and out of said channel space by movements of said handle, and pivotal support means on said frame on which said power lever said skirt and said handle are mounted for swinging movement about a common axis. v

15. In a staple driving implement the combination of, a frame including a grip adapted to be grasped bythe operators hand having spaced side walls defining a channel space therebetween, a handle pivotally mounted on said frame to swing about an axis and diverging from said grip to leave an angular gap therebetween, staple driving mechanism in part located in said angular gap including a power lever pivotally mounted on said frame to swing about said axis, a skirt carried by said handle occupying said angular gap and swingable into and out of said channel space by movements of said handle, and a pawl '11 operatively engageable with said power lever pivotally mounted on said skirt;

16. In a staple driving implement the combination of, a frameincluding a grip adapted to be grasped by the'operators hand having spaced side walls defining a channel space therebetween, a handle pivotally mounted on said frame and diverging from said grip to leave an angular gap ther'ebetweemstaple driving mechanism in part located'in said angular gapincluding a power lever, a skirt carried by said handle occupying said angular gap and swingable into and out of said channel space b'y movem'ents of said handle, and a pivot pin on said frame on which said power lever said skirt and said handleall have pivotal bearing side by side.

17. In a staple driving implement the combination of, a frame including a grip adapted to be grasped by the operators hand having spaced side walls defining a channel space therebetween, a pivot pin bridging said channel space, a handle swingably mounted on said pivot pin and diverging from said grip to leave an angular gap therebetween, staple driving mechanism in part located in said angular g'apincluding a power lever swingably mounted on said pivot pin, a skirt fixed to said handle swing-ably mounted on said pivot pin occupying said angular gap and swingable into and out of said channel space by movements of said handle, said power lever, handle and skirt being side by side. i

18. In a stapling implement incorporating staple driving mechanism, the combination of, an implement frame including an elongated hand grip portion, spaced stationary side walls rigid with and extending away from said grip portion defining a channel along the latter, an elongated handlepivotally mounted at a location on said frame to'swing toward and away from said channel in a manner 'to traverse an angular gap between said channel and the position of said handle most remote therefrom, instrumentalities for operating the staple driving mechanism traveling with and extending from said handle in j a a direction to span said angular gap, and a rigid skirt on said handle flanking said instrumentalities in a position to enter said channeL'said skirt being of shape and size substantially to fill the angular expanse of said gap in all positions of said handle in a manner to flank and shield said instrumentalities at all times.

19. In a stapling implement incorporating staple driving mechanism, the combination of, an implement frame including an elongated hand .grip portion, spaced stationary sidewalls rigid with and extending away from said grip portion defining a channel along the latter, an elongated handle pivotally mounted at a location on said frame to swing toward and away from said channel in-a manner to traverse an angular gap between said channel and the position of said handle most remote therefrom, instrumentalities for operating the staple driving mechanism traveling with and extending from said handle in a direction to span said angular gap, and two rigid spaced skirt forming flanges joined at their tops and thereat fixedly mounted on said handle respectively flanking opposite" sides of said instrumentalities and positioned to enter said channel, each of said flanges being of shape and size substantially to fill the angular expanse of said gap in all'positions of said handle in a man ner to cover and shield said instrumentalities at all times.

20. In a stapling implement incorporating staple driving mechanism, the combination of, an implement frame including an elongated hand grip portion, spaced stationary side walls rigid with and extending away'from said grip portion defining a channel along the latter, an elongated handle pivotally mounted at a location on said frame to swing toward and away from said channel in a manner to traverse an angular gap be tween said channel and the position of said handle most remote therefrom, two rigid spaced skirt forming flanges joined at their tops and thereat fixedly mounted on said handle of shape and size substantially to fill the angular expanse of said gap'in all positions of said handle, and a pawl for operating the staple driving mechanism pivotally mounted on and between said skirt forming flanges to swing relatively thereto and parallel therewith, said pawl being shaped and arranged to span the said angular gap.

7 I ROY E. PETERSON. I HOWARD M. LARSEN.

REFERENCES CITED Y The following references are of record in the file of this patent:

UNITED STATES PATENTS Krantz Aug. '10, 1943 Certificate of Correction Patent No. 2,437,039. March 2, 1948. ROY E. PETERSON ET AL.

It is hereby certified that errors appear in the printed specification of the above numbered patent requiring correction as follows: Column 1, line 11, after the Word staple insert driving power; column 8, line 49, claim 8, after the word and. comma lever, insert a swirl/gable power lever,; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 27th day of April, A. D. 1948.

THOMAS F MURPHY,

Assistant Qommissiorter of Patents. 

